Add a kernel command line parameter option to disable In-Memory Collection
(IMC) counters and add documentation. This helps in debug.
Signed-off-by: Anju T Sudhakar
Reviewed-By: Madhavan Srinivasan
---
Documentation/admin-guide/kernel-parameters.txt | 7 +
arch/powerpc/platforms/powernv/o
* Naveen N. Rao wrote (on 2017-10-06 09:28:30
+):
> On 2017/09/18 09:23AM, Santosh Sivaraj wrote:
> > Current vDSO64 implementation does not have support for coarse clocks
> > (CLOCK_MONOTONIC_COARSE, CLOCK_REALTIME_COARSE), for which it falls back
> > to system call, increasing the response
* Naveen N. Rao wrote (on 2017-10-06 11:25:28
+):
> On 2017/09/18 09:23AM, Santosh Sivaraj wrote:
> > Current vDSO64 implementation does not have support for coarse clocks
> > (CLOCK_MONOTONIC_COARSE, CLOCK_REALTIME_COARSE), for which it falls back
> > to system call, increasing the response
David Binderman writes:
> Hello there,
>
> linux-4.14-rc3/arch/powerpc/perf/imc-pmu.c:599]: (style) Unsigned variable
> 'ncpu' can't be negative so it is unnecessary to test it.
>
> Source code is
>
> if (ncpu >= 0 && ncpu < nr_cpu_ids) {
>
> but
>
> unsigned int ncpu, core_id;
>
> Sugges
On Fri, Oct 06, 2017 at 10:32:19AM +0200, Peter Zijlstra wrote:
> > AFAIU the scheduler rq->lock is held while preemption is disabled.
> > synchronize_sched() is used here to ensure that all pre-existing
> > preempt-off critical sections have completed.
> >
> > So saying that we use synchronize_sc
Acked-by: mark gross
--mark
> -Original Message-
> From: Kees Cook [mailto:keesc...@chromium.org]
> Sent: Wednesday, October 4, 2017 4:27 PM
> To: Thomas Gleixner
> Cc: Kees Cook ; Arnd Bergmann ;
> Greg Kroah-Hartman ; Gross, Mark
> ; Andrew Morton ;
> Benjamin Herrenschmidt ; Chris Me
On Fri, Oct 6, 2017 at 12:02 AM, Andrea Parri wrote:
> On Thu, Oct 05, 2017 at 04:02:06PM +, Mathieu Desnoyers wrote:
>> - On Oct 5, 2017, at 8:12 AM, Peter Zijlstra pet...@infradead.org wrote:
>>
>> > On Wed, Oct 04, 2017 at 02:37:53PM -0700, Paul E. McKenney wrote:
>> >> diff --git a/arc
On Thu, Oct 05, 2017 at 04:02:06PM +, Mathieu Desnoyers wrote:
> - On Oct 5, 2017, at 8:12 AM, Peter Zijlstra pet...@infradead.org wrote:
>
> > On Wed, Oct 04, 2017 at 02:37:53PM -0700, Paul E. McKenney wrote:
> >> diff --git a/arch/powerpc/kernel/membarrier.c
> >> b/arch/powerpc/kernel/m
On 10/05/2017 07:23 AM, Nicholas Piggin wrote:
On Wed, 4 Oct 2017 14:37:53 -0700
"Paul E. McKenney" wrote:
From: Mathieu Desnoyers
Provide a new command allowing processes to register their intent to use
the private expedited command.
This allows PowerPC to skip the full memory barrier i
Kees Cook writes:
> Drop the arguments from the macro and adjust all callers with the
> following script:
>
> perl -pi -e 's/DEFINE_TIMER\((.*), 0, 0\);/DEFINE_TIMER($1);/g;' \
> $(git grep DEFINE_TIMER | cut -d: -f1 | sort -u | grep -v timer.h)
>
> Signed-off-by: Kees Cook
> Acked-by: Gee
From: Zi Yan
A non present pmd entry can appear after pmd_lock is taken in
page_vma_mapped_walk(), even if THP migration is not enabled.
The WARN_ONCE is unnecessary.
Fixes: 616b8371539a ("mm: thp: enable thp migration in generic path")
Reported-and-tested-by: Abdul Haleem
Signed-off-by: Zi Yan
On Sat, Oct 07, 2017 at 09:02:55PM +1100, Michael Ellerman wrote:
> Ram Pai writes:
>
> > Total 32 keys are available on power7 and above. However
> > pkey 0,1 are reserved. So effectively we have 30 pkeys.
> >
> > On 4K kernels, we do not have 5 bits in the PTE to
> > represent all the
Hi! Find below my second regression report for Linux 4.14. It lists 8
regressions I'm currently aware of. One regression was fixed since last
weeks report. One was in there that shouldn't have been there.
As always: Are you aware of any other regressions? Then please let me
know by mail (a simple
On Fri, 2017-09-29 at 03:58:02 UTC, Michael Ellerman wrote:
> In opal_event_shutdown() we free all the IRQs hanging off the
> opal_event_irqchip. However it's not safe to do so if we're called
> from IRQ context, because free_irq() wants to synchronise versus IRQ
> context. This can lead to warning
On Thu, 2017-09-28 at 13:34:26 UTC, Seth Forshee wrote:
> Currently sprintf is used, and while paths should never exceed
> the size of the buffer it is theoretically possible since
> dirent.d_name is 256 bytes. As a result this trips
> -Wformat-overflow, and since the test is built with -Wall -Werr
On Thu, 2017-09-28 at 13:33:39 UTC, Seth Forshee wrote:
> Several callers to epapr_hypercall() pass an uninitialized stack
> allocated array for the input arguments, presumably because they
> have no input arguments. However this can produce errors like
> this one
>
> arch/powerpc/include/asm/epa
On Fri, 2017-09-22 at 09:10:43 UTC, "Naveen N. Rao" wrote:
> 1. This is only used in kprobes.c, so make it static.
> 2. Remove the un-necessary (ret == 0) comparison in the else clause.
>
> Reviewed-by: Masami Hiramatsu
> Reviewed-by: Kamalesh Babulal
> Signed-off-by: Naveen N. Rao
Series appl
On Thu, 2017-09-21 at 05:24:49 UTC, Michael Neuling wrote:
> This is useful, especially for developers.
>
> Signed-off-by: Michael Neuling
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/e366b921c7e32c9b92b4c524696fa8
cheers
On Mon, 2017-09-18 at 14:16:58 UTC, "Guilherme G. Piccoli" wrote:
> It might be useful to quickly get the uptime of a running
> system on xmon, without needing to grab data from memory and
> doing math on struct addresses.
>
> For example, it'd be useful to check for how long after a crash
> a sys
On Fri, 2017-09-08 at 13:52:11 UTC, Christophe Lombard wrote:
> The PSL initialization sequence has been updated to DD2.
> This patch adapts to the changes, retaining compatibility with DD1.
> The patch includes some changes to DD1 fix-ups as well.
>
> Tests performed on some of the old/new hardwa
On Tue, 2016-04-19 at 10:18:21 UTC, Kautuk Consul wrote:
> Add a check for p->state == TASK_RUNNING so that any wake-ups on
> task_struct p in the interim lead to 0 being returned by get_wchan().
>
> Signed-off-by: Kautuk Consul
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/
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